<drag-aside></drag-aside>
<header-btns id="headerBtns"></header-btns>
<canvas id="viewer" style="border: 1px solid gray; user-select: none;"></canvas>
<scene-manager id="sceneManager"></scene-manager>
<div class="form-container" id="form-container" style="position: fixed; right: 0; top: 0; z-index: 10;"></div>